MAPREDUCE-5632. TestRMContainerAllocator#testUpdatedNodes fails (jeagles)

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HDFS-4983. Numeric usernames do not work with WebHDFS FS. Contributed by Yongjun Zhang.

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Revert HDFS-4983

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YARN-1403. Separate out configuration loading from QueueManager in the Fair Scheduler (Sandy Ryza)

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